Disk harrow



- April 19, 1938. D. F. TAYLOR 2,

DISK HARROW' Filed April 14, 1957 2 Sheets-Sheet 1 INVENTOR I N Taylor QD. F. TAYLOR DISK HARROW April 19, 1938.

2 Sheets-Sheet 2 Filed April 14, 1957 4 Q INVENTOR I DJ. Taylor BY sumpose for which it is designed.

Patented Apr. 19, 1938 UNITED STATES PATENT'OFFICE Donald F. Taylor,Hughson, Calif.

Application April 14, 1937, Serial N0. 136,842

6 Claims.

This invention relates generally to a disk harrow, and in particular isdirected to a disk harrow of the two gang type and wherein the gangs arearranged in tandem relation.

The principal object of my invention is to provide a disk harrow, of thetwo gang type, arranged in combination with wheels mounted for selectiveengagement with the ground and so that when the wheels are moved to aground engaging position, the disk gangs may be raised clear of theground in order to facilitate transportation of the implement from placeto place. -A further object of my invention is to provide a two gangdisc harrow having the wheel structure referred to in the paragraphabove and a power control mechanism to shift the gangs from a parallelposition to an angled working position and vice-versa; the wheelstructure being so arranged that upon the gangs being shifted to anangled working position the wheels will simultaneously raise clear ofthe ground, and upon the gangs being shifted to a parallel position thewheels will simultaneously move to a ground engaging position and thedisk gangs lifted clear of the ground.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which. will be exceedingly effective for the pur-These objects I accomplish by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claims.

In the drawings similar characters of refer- 3108 indicate correspondingparts in the several ews:

Figure l is a fragmentary top plan of my improved disk harrow with thegangs in parallel transporting position; the relative angled position ofthe gangs being shown in dotted lines.

Figure 2 is a sectional elevation taken on line 2-2 of Fig. 1, but withthedisks in lowered working position.

Figure 3 is a side elevation of the implement in transporting position.a

Referring now more particularly to the char-.

acters of reference on the drawings, the device comprises a front diskgang comprising disks I journaled beneath a frame 2 and a rear disk angcomprising disks-3 journaled beneath another frame 4; as is usualpractice in disk gang construction. The front and rear gangs are pivotedtogether intermediate their ends by means of plates 5 which projecttoward each other from adjacent sides of the frames and are pivotedtogether as at 6. By thus securing the front and rear gangs togetherthey may be shifted from a parallel position to an angled positionrelative to each 'other.'

The implement is provided with a draft hitch 5 which comprises forwardlyand converging bars 1, such bars being pivoted at their rear ends to thefront frame adjacent its ends as at 8. Another bar unit 9 extendsrearward and upward from the junction of the bars I and is fixed at 10its rear end to an upstanding frame member III which is fixed centrallyon the front frame at its rear edge, said other bar unit ll being freelytelescopic as shown particularly at II. A draft connection I2 of anysuitable type is fixed to and projects forwardly from the junction ofthe bars 1 and 9. A double acting hydraulic. cylinder l3 provided withthe usual liquid control pipes 14 is swivelly mounted on the front frametransversely thereof adjacent one end. The piston rod of the doubleacting control cylinder extends rearwardly and is swivelly connected asat l6 to the rear frame at the corresponding end. The liquid controlpipes ll of course extend forward to the tractor and are there suitablyconnected 25 with the pressure pump and control valve for the liquidwhich is employed to actuate the cylinder l3.

A bracing beam I1 is fixed to the forward edge of the front frame 2intermediate the ends there- 0 of and projects rearwardly and upwardly,while another bracing frame I8 is connected to and extends forwardly andupwardly from the rear edge of the rear frame intermediate the endsthereof, said beams l1 and I8 being pivoted together at 35 adjacent endsas at IS. The pivot IQ is vertically alined with the pivot 6 whichconnects the two plates 5. The front bracing beam H is fixedintermediate its ends to the upstanding frame member ID in order tostrengthen the same, and the rear bracing frame I 8 although normally offixed length is arranged for telescopic adjustment as shown.

A transverse shaft 20 is rotatably journaled on the front edge of therear frame 4 and is provided with forwardly projecting parallel arms 2|.Wheels 22 are supported from the forward ends of the arms 2| on theoutside thereof, said wheels preferably being of the automotive type andprovided with rubber tires. Vertical arms 23 arefixed at their lowerends to the forward ends of arms 2| and project upwardly therefrom, across member 24 being secured between the upper ends of said arms 23.Braces 25 extend from the top of arms 23 downwardly and rearwardly to afixed 55 connection at their lower ends with the rear ends of arms 2|.The shaft 20, arms 2|, upstanding arms 2!, cross member 24 and braces 25all form in effect a rigid wheel carrying frame which is swin'gableabout shaft 20 as an axis. A'radial lever arm 26 projects upwardly fromshaft 20 and a tension spring 21 is connected between the upper'end ofsaid lever arm 26 and the rear portion of the rear frame, said tensionspring tending to hold the wheel supporting frame in raised position.Other tension springs 2111. may extend from braces 25 to the rear end ofthe rear gang: A control cable 28 is fixed at one end to an eye '23 onthe front edge of the rear frame and extends forward about a sheave 30on the rear edge of the front frame, then extends back about anothersheave 3i on the rear frame adjacent the eye 29, passes outward to asheave 32 on the rear edge of the front frame immediately adjacent theouter end thereof. From this point the control cable 28 extends to asheave 33 on the front frame near the center thereof and at a point toone side of bracing frame I], the cable running upward from sheave 33 toa sheave 34 secured to the cross member 24 and then back down to theforward edge of the front frame where it is deadended as at 35.

Operation when the front and rear gangs are shifted from an angledworking position to a. parallel position by the retraction of the pistonrod of the double acting control cylinder, the reaches of thecontrolcable extending from sheave 33 to sheave 34 and from sheave 34 to thedead end connection at 35 are materially shortened 'due to the fact thatthe distance between sheaves 30 and Si is increased. This causes thewheel supporting frame to be lowered about its axis bringing the wheelsinto engagement with the ground and then raising the front and rear diskgangs clear of the ground in the manner shown in Fig. 3. In suchposition, the implement may be transported rapidly over highways etc.without interference from the disks. A short chain 38 is secured to thefront frame and is hooked to an eye 31 to maintain the front gang fromtilting down when the implement is being transported.

The bar I i is freely telescopic in order that the hitch frame may swingrelative to the front frame when the implement is adjusted from oneposition to another. The rear frame brace i8 is selectively telescopicin order that the rear -gang may be adjusted up or down to control theworking depth of the harrow.

From a transporting position with the gangs .parallel, the implement isshifted to an angled and lowered position for working by causing theprojection of the piston rod of the hydraulic control cylinder, theadjacent reaches of the cable being shortened, lengthening the reachesbetween sheaves 34 and 33 and between sheave 3t and the dead end as at35. This allows the weight of the gangsetc. to lower them to the groundand to a working position and the tension springs 2'! and 21a. to raisethe wheel frame so that the wheels clear the ground.

If desired, the gangs when in angled working position may he movedsomewhat toward a parallel position in order to bring the wheels to apartially lowered position so as to facilitate turhing of the harrow inthe field or to control the working depth of said gangs.

From the foregoing description it will be readily the appended claims.

Having thus described my invention, what I 'claim as new and useful anddesire to secure lty Letters Patent is: 1

1. In a disk harrow of the two gang type, front and rear gangs connectedtogether for relative angular shifting movement in a horizontalplane,

means to shift the gangs, a pair of wheels, means mounting the wheels inconnection with the gangs for relative raising and lowering movement,and means to raise and lower said wheel mounting means, said last namedmeans being arranged to operate simultaneously with the operation of thegang shifting means.

2. In a disk harrow of the two gang type, front and rear gangs swivellyconnected together and normally disposed in an angled working position,means to shift the gangs to a substantially parallel position, a pair ofwheels, means mounting the wheels in connection with the gangs forrelative raising and lowering movement, means normally holding thewheels in raised position, and means operable upon shifting of the gangstoward a parallel position to lower the wheels.

3. In a disk harrow of the two gang type, front and rear gangs connectedtogether for relatively angular shifting movement, said gangs being ofwheels, a wheel supporting frame pivoted in offset relation to the axisof the wheels on one gang for raising or lowering movement betweenthegangs, and means to raise or lower said frame, said means being arrangedto operate simultaneously with the gang shifting means.

4. A device as in claim 1 in which said last named means lowers theframe upon shifting movement of the gangs in a direction to decrease theangular relation thereof.

5. In a disk harrow of the two gang type, front and rear gangs swivellyconnected together intermediate their ends for relative angular shiftingmovement and normally disposed in angled relation, said gangs beingspaced apart, means to shift the gangs, a pair of wheels, a wheelsupporting frame pivoted on the rear gang adjacent its front edge andprojecting forward between the gangs for raising or lowering movement,said frame including an arm upstanding from the forward portion thereof,a spring to exert a frame raising tension, a control cable connected tothe arm adiacent its upper end and extending about a sheave on theforward gang and thence to a fixed connection on the rear gang; saidsheave and connection being disposed on that side of the swivelconnection of the gangs which will shorten the reach of the cablebetween said arm and sheave with decrease in angular relation of thegangs whereby to draw the frame to a lowered positionl 6. A device as inclaim 3 in which said gang shifting means comprises a hydraulic controlcylinder swivelly mounted on one gang with the outer end of the pistonrod of the cylinder swivelly spaced apart, means to shift the gangs, 9.pair

